{ "stac_version": "1.0.0", "stac_extensions": [ "https://stac-extensions.github.io/raster/v1.1.0/schema.json", "https://stac-extensions.github.io/classification/v2.0.0/schema.json", "https://stac-extensions.github.io/table/v1.2.0/schema.json", "https://stac-extensions.github.io/scientific/v1.0.0/schema.json" ], "type": "Collection", "id": "mtbs-severity-1984-2024-ak", "title": "MTBS Annual Thematic Burn Severity, Alaska 1984-2023", "description": "Annual thematic burn severity from the Monitoring Trends in Burn Severity (MTBS) program for Alaska, at the source resolution of 30 metres. One composite per calendar year, covering 36 years from 1984 to 2023, published as a WGS84 cloud-optimized GeoTIFF per year plus two H3 hex products at native resolution 10 with parents 9, 8 and 0. This is the observational record of what burned and how severely, as distinct from a model of where fire is likely.\n\n**Both hex products are one dataset partitioned by year**, so a single year is a filter rather than a separate table, and change over time is a join on the cell:\n\n```sql\n-- one year\nSELECT * FROM read_parquet('https://s3-west.nrp-nautilus.io/public-fire/mtbs-severity-1984-2024-ak/hex/year=*/h0=*/data_0.parquet')\nWHERE year = 2020;\n-- how many times each place burned across the record\nSELECT h10, COUNT(DISTINCT year) AS times_burned\nFROM read_parquet('https://s3-west.nrp-nautilus.io/public-fire/mtbs-severity-1984-2024-ak/hex/year=*/h0=*/data_0.parquet')\nGROUP BY h10;\n```\n\n**This is not a complete fire census, and a count of fires here is not a count of fires.** MTBS maps only fires above a size threshold: 1,000 acres in the western United States and 500 acres in the east. Smaller fires are absent by design, not by omission, and they are the large majority of ignitions. For ignition counts and small-fire statistics use a fire occurrence database rather than this collection.\n\n**Codes 5 and 6 are not severity levels and belong outside any severity denominator, and in the fractional-coverage asset neither does code 0.** Code 5 is increased post-fire greenness; code 6 is area the program excluded from mapping because of cloud, shadow or missing imagery; code 0, which appears only in the fractional-coverage asset, is the part of a cell that is not mapped burned ground at all and typically carries several percent of the total coverage. A \"share burned at high severity\" figure that leaves any of them in the denominator is diluted by ground that was never assigned a severity at all \u2014 which is why the query below names the classes it wants rather than dividing by a bare `SUM(frac)`:\n\n```sql\n-- share of burned area at high severity, codes 1-4 as the denominator\nSELECT SUM(frac) FILTER (WHERE severity = 4) / SUM(frac) FILTER (WHERE severity BETWEEN 1 AND 4)\nFROM read_parquet('...');\n```\n\n**Two hex assets, and the choice between them changes the answer.** The `mode` asset gives each cell its single dominant severity class. The `fractions` asset gives, for every cell, the share of the cell in each class. Use `mode` for a map of dominant severity; use `fractions` for any statistic about how much area burned at a given severity. A cell that is 40 percent high severity and 60 percent moderate becomes entirely moderate under `mode`, so a share computed from `mode` alone loses that 40 percent.\n\n**The same ground burns more than once, and that is signal rather than duplication.** Over four decades a great deal of land in the fire-prone West has burned two, three or more times. Any total acreage therefore has to say which of two different quantities it means, and the two differ substantially:\n\n```sql\n-- unique ground: area that burned at least once, each place counted once\nSELECT COUNT(DISTINCT h10) FROM read_parquet('...');\n-- fire-years: each (place, year) pair counted separately, so a reburn counts twice\nSELECT COUNT(DISTINCT (h10, year)) FROM read_parquet('...');\n-- how often each place burned, and where reburns are\nSELECT h10, COUNT(DISTINCT year) AS times_burned\nFROM read_parquet('...') GROUP BY h10 HAVING times_burned > 1;\n```\n\nMeasured on this release: 45,128,351 resolution 10 cells burned at least once, against 57,552,314 (fire, cell) pairs \u2014 27.5 percent more fire-years than unique ground. 8,365,073 cells burned more than once and the most-burned cell burned 19 times. Deduplicating across years to make a total \"clean\" destroys that record, which for many questions is the interesting part.\n\n**Missing years: 1987, 1995, 2001, 2013.** The published source archive lists a Alaska mosaic for each of these years, with a size and a checksum, but the stored objects could not be retrieved \u2014 every request returns a not-found response, and no alternative direct-download route for the annual mosaics exists. These years are absent from this collection rather than empty. A time series across 1984 to 2023 must skip them, and a query filtering on one of them returns no rows: that means the severity mapping is unavailable, not that nothing burned. The perimeters collection does cover all 41 years, so whether a place burned in a missing year remains answerable there; only the severity classes are gone.\n\n**Area truth comes from the source grid, not from pixel counts on the published COG.** The source is an equal-area Albers grid, so counting its pixels measures area. The COG published here is geographic (EPSG:4326) and therefore is not equal-area, so counting its pixels does not. H3 cells at a fixed resolution are near-equal-area, so cell counts and fractional coverage on the hex assets are a valid area proxy.\n\n**Native resolution 10 is the closest H3 resolution to a 30 metre pixel, and it is still coarser than the source.** A resolution 10 cell holds roughly 17 source pixels, so the `mode` product's dominant class discards a real mix within each cell; that is what the `fractions` product is for.\n\n**Alaska extent.** Clipped to 180 degrees west to 129 degrees west, 48.8 to 71.6 degrees north, which drops the far-western Aleutians where the source grid wraps the antimeridian. No National Forest System land lies in the dropped area \u2014 the Alaska units are the Tongass and the Chugach, far to the east \u2014 but this is therefore not a complete Alaska mosaic and should not be described as one.\n\n**Hawaii and Puerto Rico are not included in either severity collection.** MTBS publishes Hawaii mosaics for 17 years and Puerto Rico for only 2005, 2007 and 2013; both are staged unmodified under `https://s3-west.nrp-nautilus.io/public-fire/raw/mtbs/mosaics/` but are not processed here. Puerto Rico is the only National Forest System gap this creates, at El Yunque. The perimeters collection covers both.\n\nThe other domain is published separately as `mtbs-severity-1984-2024-conus` because MTBS ships each domain on its own Albers grid. Severity classes mean the same thing in both, so unlike a domain-relative hazard classification these two are directly comparable \u2014 join them on the resolution 8 cell.\n\nProvenance: retrieved from the USGS ScienceBase release on 2026-08-21. Editions: Thematic Burn Severity Mosaics, version 9.0 (August 2024) for 1984-2022 and version 12.0 (April 2025) for 2023-2024. Source mosaics are staged unmodified under `https://s3-west.nrp-nautilus.io/public-fire/raw/mtbs/mosaics/`, with the per-file size, published MD5 and recomputed MD5 recorded in `https://s3-west.nrp-nautilus.io/public-fire/raw/mtbs/mosaic-manifest.tsv`.", "license": "public-domain", "sci:citation": "Eidenshink, J., Schwind, B., Brewer, K., Zhu, Z.-L., Quayle, B., and Howard, S. 2007. A project for monitoring trends in burn severity. Fire Ecology 3(1): 3-21. Data: USGS/USFS Monitoring Trends in Burn Severity, Thematic Burn Severity Mosaics, version 9.0 (August 2024) for 1984-2022 and version 12.0 (April 2025) for 2023-2024. Accessed 2026-08-21 from https://www.sciencebase.gov/catalog/item/5e91dee782ce172707f02cdd.", "sci:publications": [ { "doi": "10.1186/s42408-020-00076-y", "citation": "Picotte, J.J., et al. 2020. Changes to the Monitoring Trends in Burn Severity program mapping production procedures and data products. Fire Ecology 16:16." } ], "keywords": [ "wildfire", "burn severity", "fire effects", "MTBS", "H3", "Alaska", "United States", "USGS", "USDA Forest Service" ], "extent": { "spatial": { "bbox": [ [ -166.191, 56.73, -140.157, 70.159 ] ] }, "temporal": { "interval": [ [ "1984-01-01T00:00:00Z", "2023-12-31T23:59:59Z" ] ] } }, "providers": [ { "name": "USGS EROS and USDA Forest Service Geospatial Technology and Applications Center (Monitoring Trends in Burn Severity)", "roles": [ "producer", "licensor" ], "url": "https://www.mtbs.gov/" }, { "name": "USGS ScienceBase", "roles": [ "host" ], "url": "https://www.sciencebase.gov/catalog/item/5e91dee782ce172707f02cdd" }, { "name": "Boettiger Lab / cirrus", "roles": [ "processor", "host" ], "url": "https://s3-west.nrp-nautilus.io/public-fire/" } ], "links": [ { "rel": "self", "href": "https://s3-west.nrp-nautilus.io/public-fire/mtbs-severity-1984-2024-ak/stac-collection.json", "type": "application/json" }, { "rel": "root", "href": "https://s3-west.nrp-nautilus.io/public-data/stac/catalog.json", "type": "application/json" }, { "rel": "parent", "href": "https://s3-west.nrp-nautilus.io/public-fire/stac-collection.json", "type": "application/json" }, { "rel": "license", "href": "https://www.usa.gov/government-works", "type": "text/html", "title": "US Government work - public domain" }, { "rel": "about", "href": "https://www.mtbs.gov/", "type": "text/html", "title": "Monitoring Trends in Burn Severity program" }, { "rel": "source", "href": "https://www.sciencebase.gov/catalog/item/5e91dee782ce172707f02cdd", "type": "text/html", "title": "USGS ScienceBase release read on 2026-08-21" }, { "rel": "cite-as", "href": "https://doi.org/10.1186/s42408-020-00076-y", "title": "Picotte et al. 2020, Fire Ecology 16:16" } ], "assets": { "mtbs-severity-ak-cog-1984": { "href": "https://s3-west.nrp-nautilus.io/public-fire/mtbs-severity-1984-2024-ak/mtbs-severity-ak-1984-cog.tif", "type": "image/tiff; application=geotiff; profile=cloud-optimized", "title": "MTBS burn severity 1984 (Alaska, 30 m COG)", "description": "Thematic burn severity for fires mapped in 1984, reprojected from the source equal-area Albers grid to EPSG:4326 with nearest-neighbour resampling \u2014 required, because the values are class codes and any other resampling invents classes the source does not contain. Geographic and therefore not equal-area: use the hex assets for area statistics.", "roles": [ "data" ], "raster:bands": [ { "name": "burn_severity", "data_type": "uint8", "nodata": 0, "spatial_resolution": 30, "unit": "class code", "classification:classes": [ { "value": 0, "name": "Background / Not Mapped", "description": "Ground that is not mapped burned area -- outside any MTBS fire perimeter, or source no-data. This is the raster's no-data value and the large majority of every source mosaic. In the fractional-coverage asset it is the share of the cell lying outside any mapped fire, which is what makes each cell's shares sum to 1. It is absent from the dominant-class asset, where no-data is dropped. Not a severity level: exclude it from every severity denominator.", "color_hint": "000000" }, { "value": 1, "name": "Unburned to Low", "description": "Unburned, or burned at a severity too low to separate from unburned.", "color_hint": "006400" }, { "value": 2, "name": "Low", "description": "Low burn severity.", "color_hint": "7FFFD4" }, { "value": 3, "name": "Moderate", "description": "Moderate burn severity.", "color_hint": "FFFF00" }, { "value": 4, "name": "High", "description": "High burn severity.", "color_hint": "FF0000" }, { "value": 5, "name": "Increased Greenness", "description": "Increased greenness / increased post-fire vegetation response. Not a burn severity level.", "color_hint": "7FFF00" }, { "value": 6, "name": "Non-Processing Area Mask", "description": "Area excluded from severity mapping (cloud, shadow, missing imagery). Not a burn severity level.", "color_hint": "FFFFFF" } ] } ] }, "mtbs-severity-ak-cog-1985": { "href": "https://s3-west.nrp-nautilus.io/public-fire/mtbs-severity-1984-2024-ak/mtbs-severity-ak-1985-cog.tif", "type": "image/tiff; application=geotiff; profile=cloud-optimized", "title": "MTBS burn severity 1985 (Alaska, 30 m COG)", "description": "Thematic burn severity for fires mapped in 1985, reprojected from the source equal-area Albers grid to EPSG:4326 with nearest-neighbour resampling \u2014 required, because the values are class codes and any other resampling invents classes the source does not contain. Geographic and therefore not equal-area: use the hex assets for area statistics.", "roles": [ "data" ], "raster:bands": [ { "name": "burn_severity", "data_type": "uint8", "nodata": 0, "spatial_resolution": 30, "unit": "class code", "classification:classes": [ { "value": 0, "name": "Background / Not Mapped", "description": "Ground that is not mapped burned area -- outside any MTBS fire perimeter, or source no-data. This is the raster's no-data value and the large majority of every source mosaic. In the fractional-coverage asset it is the share of the cell lying outside any mapped fire, which is what makes each cell's shares sum to 1. It is absent from the dominant-class asset, where no-data is dropped. Not a severity level: exclude it from every severity denominator.", "color_hint": "000000" }, { "value": 1, "name": "Unburned to Low", "description": "Unburned, or burned at a severity too low to separate from unburned.", "color_hint": "006400" }, { "value": 2, "name": "Low", "description": "Low burn severity.", "color_hint": "7FFFD4" }, { "value": 3, "name": "Moderate", "description": "Moderate burn severity.", "color_hint": "FFFF00" }, { "value": 4, "name": "High", "description": "High burn severity.", "color_hint": "FF0000" }, { "value": 5, "name": "Increased Greenness", "description": "Increased greenness / increased post-fire vegetation response. Not a burn severity level.", "color_hint": "7FFF00" }, { "value": 6, "name": "Non-Processing Area Mask", "description": "Area excluded from severity mapping (cloud, shadow, missing imagery). Not a burn severity level.", "color_hint": "FFFFFF" } ] } ] }, "mtbs-severity-ak-cog-1986": { "href": "https://s3-west.nrp-nautilus.io/public-fire/mtbs-severity-1984-2024-ak/mtbs-severity-ak-1986-cog.tif", "type": "image/tiff; application=geotiff; profile=cloud-optimized", "title": "MTBS burn severity 1986 (Alaska, 30 m COG)", "description": "Thematic burn severity for fires mapped in 1986, reprojected from the source equal-area Albers grid to EPSG:4326 with nearest-neighbour resampling \u2014 required, because the values are class codes and any other resampling invents classes the source does not contain. Geographic and therefore not equal-area: use the hex assets for area statistics.", "roles": [ "data" ], "raster:bands": [ { "name": "burn_severity", "data_type": "uint8", "nodata": 0, "spatial_resolution": 30, "unit": "class code", "classification:classes": [ { "value": 0, "name": "Background / Not Mapped", "description": "Ground that is not mapped burned area -- outside any MTBS fire perimeter, or source no-data. This is the raster's no-data value and the large majority of every source mosaic. In the fractional-coverage asset it is the share of the cell lying outside any mapped fire, which is what makes each cell's shares sum to 1. It is absent from the dominant-class asset, where no-data is dropped. Not a severity level: exclude it from every severity denominator.", "color_hint": "000000" }, { "value": 1, "name": "Unburned to Low", "description": "Unburned, or burned at a severity too low to separate from unburned.", "color_hint": "006400" }, { "value": 2, "name": "Low", "description": "Low burn severity.", "color_hint": "7FFFD4" }, { "value": 3, "name": "Moderate", "description": "Moderate burn severity.", "color_hint": "FFFF00" }, { "value": 4, "name": "High", "description": "High burn severity.", "color_hint": "FF0000" }, { "value": 5, "name": "Increased Greenness", "description": "Increased greenness / increased post-fire vegetation response. Not a burn severity level.", "color_hint": "7FFF00" }, { "value": 6, "name": "Non-Processing Area Mask", "description": "Area excluded from severity mapping (cloud, shadow, missing imagery). Not a burn severity level.", "color_hint": "FFFFFF" } ] } ] }, "mtbs-severity-ak-cog-1988": { "href": "https://s3-west.nrp-nautilus.io/public-fire/mtbs-severity-1984-2024-ak/mtbs-severity-ak-1988-cog.tif", "type": "image/tiff; application=geotiff; profile=cloud-optimized", "title": "MTBS burn severity 1988 (Alaska, 30 m COG)", "description": "Thematic burn severity for fires mapped in 1988, reprojected from the source equal-area Albers grid to EPSG:4326 with nearest-neighbour resampling \u2014 required, because the values are class codes and any other resampling invents classes the source does not contain. Geographic and therefore not equal-area: use the hex assets for area statistics.", "roles": [ "data" ], "raster:bands": [ { "name": "burn_severity", "data_type": "uint8", "nodata": 0, "spatial_resolution": 30, "unit": "class code", "classification:classes": [ { "value": 0, "name": "Background / Not Mapped", "description": "Ground that is not mapped burned area -- outside any MTBS fire perimeter, or source no-data. This is the raster's no-data value and the large majority of every source mosaic. In the fractional-coverage asset it is the share of the cell lying outside any mapped fire, which is what makes each cell's shares sum to 1. It is absent from the dominant-class asset, where no-data is dropped. Not a severity level: exclude it from every severity denominator.", "color_hint": "000000" }, { "value": 1, "name": "Unburned to Low", "description": "Unburned, or burned at a severity too low to separate from unburned.", "color_hint": "006400" }, { "value": 2, "name": "Low", "description": "Low burn severity.", "color_hint": "7FFFD4" }, { "value": 3, "name": "Moderate", "description": "Moderate burn severity.", "color_hint": "FFFF00" }, { "value": 4, "name": "High", "description": "High burn severity.", "color_hint": "FF0000" }, { "value": 5, "name": "Increased Greenness", "description": "Increased greenness / increased post-fire vegetation response. Not a burn severity level.", "color_hint": "7FFF00" }, { "value": 6, "name": "Non-Processing Area Mask", "description": "Area excluded from severity mapping (cloud, shadow, missing imagery). Not a burn severity level.", "color_hint": "FFFFFF" } ] } ] }, "mtbs-severity-ak-cog-1989": { "href": "https://s3-west.nrp-nautilus.io/public-fire/mtbs-severity-1984-2024-ak/mtbs-severity-ak-1989-cog.tif", "type": "image/tiff; application=geotiff; profile=cloud-optimized", "title": "MTBS burn severity 1989 (Alaska, 30 m COG)", "description": "Thematic burn severity for fires mapped in 1989, reprojected from the source equal-area Albers grid to EPSG:4326 with nearest-neighbour resampling \u2014 required, because the values are class codes and any other resampling invents classes the source does not contain. Geographic and therefore not equal-area: use the hex assets for area statistics.", "roles": [ "data" ], "raster:bands": [ { "name": "burn_severity", "data_type": "uint8", "nodata": 0, "spatial_resolution": 30, "unit": "class code", "classification:classes": [ { "value": 0, "name": "Background / Not Mapped", "description": "Ground that is not mapped burned area -- outside any MTBS fire perimeter, or source no-data. This is the raster's no-data value and the large majority of every source mosaic. In the fractional-coverage asset it is the share of the cell lying outside any mapped fire, which is what makes each cell's shares sum to 1. It is absent from the dominant-class asset, where no-data is dropped. Not a severity level: exclude it from every severity denominator.", "color_hint": "000000" }, { "value": 1, "name": "Unburned to Low", "description": "Unburned, or burned at a severity too low to separate from unburned.", "color_hint": "006400" }, { "value": 2, "name": "Low", "description": "Low burn severity.", "color_hint": "7FFFD4" }, { "value": 3, "name": "Moderate", "description": "Moderate burn severity.", "color_hint": "FFFF00" }, { "value": 4, "name": "High", "description": "High burn severity.", "color_hint": "FF0000" }, { "value": 5, "name": "Increased Greenness", "description": "Increased greenness / increased post-fire vegetation response. Not a burn severity level.", "color_hint": "7FFF00" }, { "value": 6, "name": "Non-Processing Area Mask", "description": "Area excluded from severity mapping (cloud, shadow, missing imagery). Not a burn severity level.", "color_hint": "FFFFFF" } ] } ] }, "mtbs-severity-ak-cog-1990": { "href": "https://s3-west.nrp-nautilus.io/public-fire/mtbs-severity-1984-2024-ak/mtbs-severity-ak-1990-cog.tif", "type": "image/tiff; application=geotiff; profile=cloud-optimized", "title": "MTBS burn severity 1990 (Alaska, 30 m COG)", "description": "Thematic burn severity for fires mapped in 1990, reprojected from the source equal-area Albers grid to EPSG:4326 with nearest-neighbour resampling \u2014 required, because the values are class codes and any other resampling invents classes the source does not contain. Geographic and therefore not equal-area: use the hex assets for area statistics.", "roles": [ "data" ], "raster:bands": [ { "name": "burn_severity", "data_type": "uint8", "nodata": 0, "spatial_resolution": 30, "unit": "class code", "classification:classes": [ { "value": 0, "name": "Background / Not Mapped", "description": "Ground that is not mapped burned area -- outside any MTBS fire perimeter, or source no-data. This is the raster's no-data value and the large majority of every source mosaic. In the fractional-coverage asset it is the share of the cell lying outside any mapped fire, which is what makes each cell's shares sum to 1. It is absent from the dominant-class asset, where no-data is dropped. Not a severity level: exclude it from every severity denominator.", "color_hint": "000000" }, { "value": 1, "name": "Unburned to Low", "description": "Unburned, or burned at a severity too low to separate from unburned.", "color_hint": "006400" }, { "value": 2, "name": "Low", "description": "Low burn severity.", "color_hint": "7FFFD4" }, { "value": 3, "name": "Moderate", "description": "Moderate burn severity.", "color_hint": "FFFF00" }, { "value": 4, "name": "High", "description": "High burn severity.", "color_hint": "FF0000" }, { "value": 5, "name": "Increased Greenness", "description": "Increased greenness / increased post-fire vegetation response. Not a burn severity level.", "color_hint": "7FFF00" }, { "value": 6, "name": "Non-Processing Area Mask", "description": "Area excluded from severity mapping (cloud, shadow, missing imagery). Not a burn severity level.", "color_hint": "FFFFFF" } ] } ] }, "mtbs-severity-ak-cog-1991": { "href": "https://s3-west.nrp-nautilus.io/public-fire/mtbs-severity-1984-2024-ak/mtbs-severity-ak-1991-cog.tif", "type": "image/tiff; application=geotiff; profile=cloud-optimized", "title": "MTBS burn severity 1991 (Alaska, 30 m COG)", "description": "Thematic burn severity for fires mapped in 1991, reprojected from the source equal-area Albers grid to EPSG:4326 with nearest-neighbour resampling \u2014 required, because the values are class codes and any other resampling invents classes the source does not contain. Geographic and therefore not equal-area: use the hex assets for area statistics.", "roles": [ "data" ], "raster:bands": [ { "name": "burn_severity", "data_type": "uint8", "nodata": 0, "spatial_resolution": 30, "unit": "class code", "classification:classes": [ { "value": 0, "name": "Background / Not Mapped", "description": "Ground that is not mapped burned area -- outside any MTBS fire perimeter, or source no-data. This is the raster's no-data value and the large majority of every source mosaic. In the fractional-coverage asset it is the share of the cell lying outside any mapped fire, which is what makes each cell's shares sum to 1. It is absent from the dominant-class asset, where no-data is dropped. Not a severity level: exclude it from every severity denominator.", "color_hint": "000000" }, { "value": 1, "name": "Unburned to Low", "description": "Unburned, or burned at a severity too low to separate from unburned.", "color_hint": "006400" }, { "value": 2, "name": "Low", "description": "Low burn severity.", "color_hint": "7FFFD4" }, { "value": 3, "name": "Moderate", "description": "Moderate burn severity.", "color_hint": "FFFF00" }, { "value": 4, "name": "High", "description": "High burn severity.", "color_hint": "FF0000" }, { "value": 5, "name": "Increased Greenness", "description": "Increased greenness / increased post-fire vegetation response. Not a burn severity level.", "color_hint": "7FFF00" }, { "value": 6, "name": "Non-Processing Area Mask", "description": "Area excluded from severity mapping (cloud, shadow, missing imagery). Not a burn severity level.", "color_hint": "FFFFFF" } ] } ] }, "mtbs-severity-ak-cog-1992": { "href": "https://s3-west.nrp-nautilus.io/public-fire/mtbs-severity-1984-2024-ak/mtbs-severity-ak-1992-cog.tif", "type": "image/tiff; application=geotiff; profile=cloud-optimized", "title": "MTBS burn severity 1992 (Alaska, 30 m COG)", "description": "Thematic burn severity for fires mapped in 1992, reprojected from the source equal-area Albers grid to EPSG:4326 with nearest-neighbour resampling \u2014 required, because the values are class codes and any other resampling invents classes the source does not contain. Geographic and therefore not equal-area: use the hex assets for area statistics.", "roles": [ "data" ], "raster:bands": [ { "name": "burn_severity", "data_type": "uint8", "nodata": 0, "spatial_resolution": 30, "unit": "class code", "classification:classes": [ { "value": 0, "name": "Background / Not Mapped", "description": "Ground that is not mapped burned area -- outside any MTBS fire perimeter, or source no-data. This is the raster's no-data value and the large majority of every source mosaic. In the fractional-coverage asset it is the share of the cell lying outside any mapped fire, which is what makes each cell's shares sum to 1. It is absent from the dominant-class asset, where no-data is dropped. Not a severity level: exclude it from every severity denominator.", "color_hint": "000000" }, { "value": 1, "name": "Unburned to Low", "description": "Unburned, or burned at a severity too low to separate from unburned.", "color_hint": "006400" }, { "value": 2, "name": "Low", "description": "Low burn severity.", "color_hint": "7FFFD4" }, { "value": 3, "name": "Moderate", "description": "Moderate burn severity.", "color_hint": "FFFF00" }, { "value": 4, "name": "High", "description": "High burn severity.", "color_hint": "FF0000" }, { "value": 5, "name": "Increased Greenness", "description": "Increased greenness / increased post-fire vegetation response. Not a burn severity level.", "color_hint": "7FFF00" }, { "value": 6, "name": "Non-Processing Area Mask", "description": "Area excluded from severity mapping (cloud, shadow, missing imagery). Not a burn severity level.", "color_hint": "FFFFFF" } ] } ] }, "mtbs-severity-ak-cog-1993": { "href": "https://s3-west.nrp-nautilus.io/public-fire/mtbs-severity-1984-2024-ak/mtbs-severity-ak-1993-cog.tif", "type": "image/tiff; application=geotiff; profile=cloud-optimized", "title": "MTBS burn severity 1993 (Alaska, 30 m COG)", "description": "Thematic burn severity for fires mapped in 1993, reprojected from the source equal-area Albers grid to EPSG:4326 with nearest-neighbour resampling \u2014 required, because the values are class codes and any other resampling invents classes the source does not contain. 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Not a severity level: exclude it from every severity denominator.", "color_hint": "000000" }, { "value": 1, "name": "Unburned to Low", "description": "Unburned, or burned at a severity too low to separate from unburned.", "color_hint": "006400" }, { "value": 2, "name": "Low", "description": "Low burn severity.", "color_hint": "7FFFD4" }, { "value": 3, "name": "Moderate", "description": "Moderate burn severity.", "color_hint": "FFFF00" }, { "value": 4, "name": "High", "description": "High burn severity.", "color_hint": "FF0000" }, { "value": 5, "name": "Increased Greenness", "description": "Increased greenness / increased post-fire vegetation response. Not a burn severity level.", "color_hint": "7FFF00" }, { "value": 6, "name": "Non-Processing Area Mask", "description": "Area excluded from severity mapping (cloud, shadow, missing imagery). Not a burn severity level.", "color_hint": "FFFFFF" } ] } ] }, "mtbs-severity-ak-cog-1994": { "href": "https://s3-west.nrp-nautilus.io/public-fire/mtbs-severity-1984-2024-ak/mtbs-severity-ak-1994-cog.tif", "type": "image/tiff; application=geotiff; profile=cloud-optimized", "title": "MTBS burn severity 1994 (Alaska, 30 m COG)", "description": "Thematic burn severity for fires mapped in 1994, reprojected from the source equal-area Albers grid to EPSG:4326 with nearest-neighbour resampling \u2014 required, because the values are class codes and any other resampling invents classes the source does not contain. 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Not a burn severity level.", "color_hint": "FFFFFF" } ] } ] }, "mtbs-severity-ak-cog-1996": { "href": "https://s3-west.nrp-nautilus.io/public-fire/mtbs-severity-1984-2024-ak/mtbs-severity-ak-1996-cog.tif", "type": "image/tiff; application=geotiff; profile=cloud-optimized", "title": "MTBS burn severity 1996 (Alaska, 30 m COG)", "description": "Thematic burn severity for fires mapped in 1996, reprojected from the source equal-area Albers grid to EPSG:4326 with nearest-neighbour resampling \u2014 required, because the values are class codes and any other resampling invents classes the source does not contain. Geographic and therefore not equal-area: use the hex assets for area statistics.", "roles": [ "data" ], "raster:bands": [ { "name": "burn_severity", "data_type": "uint8", "nodata": 0, "spatial_resolution": 30, "unit": "class code", "classification:classes": [ { "value": 0, "name": "Background / Not Mapped", "description": "Ground that is not mapped burned area -- outside any MTBS fire perimeter, or source no-data. This is the raster's no-data value and the large majority of every source mosaic. In the fractional-coverage asset it is the share of the cell lying outside any mapped fire, which is what makes each cell's shares sum to 1. It is absent from the dominant-class asset, where no-data is dropped. 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Not a burn severity level.", "color_hint": "FFFFFF" } ] } ] }, "mtbs-severity-ak-cog-1997": { "href": "https://s3-west.nrp-nautilus.io/public-fire/mtbs-severity-1984-2024-ak/mtbs-severity-ak-1997-cog.tif", "type": "image/tiff; application=geotiff; profile=cloud-optimized", "title": "MTBS burn severity 1997 (Alaska, 30 m COG)", "description": "Thematic burn severity for fires mapped in 1997, reprojected from the source equal-area Albers grid to EPSG:4326 with nearest-neighbour resampling \u2014 required, because the values are class codes and any other resampling invents classes the source does not contain. Geographic and therefore not equal-area: use the hex assets for area statistics.", "roles": [ "data" ], "raster:bands": [ { "name": "burn_severity", "data_type": "uint8", "nodata": 0, "spatial_resolution": 30, "unit": "class code", "classification:classes": [ { "value": 0, "name": "Background / Not Mapped", "description": "Ground that is not mapped burned area -- outside any MTBS fire perimeter, or source no-data. This is the raster's no-data value and the large majority of every source mosaic. In the fractional-coverage asset it is the share of the cell lying outside any mapped fire, which is what makes each cell's shares sum to 1. It is absent from the dominant-class asset, where no-data is dropped. Not a severity level: exclude it from every severity denominator.", "color_hint": "000000" }, { "value": 1, "name": "Unburned to Low", "description": "Unburned, or burned at a severity too low to separate from unburned.", "color_hint": "006400" }, { "value": 2, "name": "Low", "description": "Low burn severity.", "color_hint": "7FFFD4" }, { "value": 3, "name": "Moderate", "description": "Moderate burn severity.", "color_hint": "FFFF00" }, { "value": 4, "name": "High", "description": "High burn severity.", "color_hint": "FF0000" }, { "value": 5, "name": "Increased Greenness", "description": "Increased greenness / increased post-fire vegetation response. Not a burn severity level.", "color_hint": "7FFF00" }, { "value": 6, "name": "Non-Processing Area Mask", "description": "Area excluded from severity mapping (cloud, shadow, missing imagery). Not a burn severity level.", "color_hint": "FFFFFF" } ] } ] }, "mtbs-severity-ak-cog-1998": { "href": "https://s3-west.nrp-nautilus.io/public-fire/mtbs-severity-1984-2024-ak/mtbs-severity-ak-1998-cog.tif", "type": "image/tiff; application=geotiff; profile=cloud-optimized", "title": "MTBS burn severity 1998 (Alaska, 30 m COG)", "description": "Thematic burn severity for fires mapped in 1998, reprojected from the source equal-area Albers grid to EPSG:4326 with nearest-neighbour resampling \u2014 required, because the values are class codes and any other resampling invents classes the source does not contain. Geographic and therefore not equal-area: use the hex assets for area statistics.", "roles": [ "data" ], "raster:bands": [ { "name": "burn_severity", "data_type": "uint8", "nodata": 0, "spatial_resolution": 30, "unit": "class code", "classification:classes": [ { "value": 0, "name": "Background / Not Mapped", "description": "Ground that is not mapped burned area -- outside any MTBS fire perimeter, or source no-data. This is the raster's no-data value and the large majority of every source mosaic. In the fractional-coverage asset it is the share of the cell lying outside any mapped fire, which is what makes each cell's shares sum to 1. It is absent from the dominant-class asset, where no-data is dropped. Not a severity level: exclude it from every severity denominator.", "color_hint": "000000" }, { "value": 1, "name": "Unburned to Low", "description": "Unburned, or burned at a severity too low to separate from unburned.", "color_hint": "006400" }, { "value": 2, "name": "Low", "description": "Low burn severity.", "color_hint": "7FFFD4" }, { "value": 3, "name": "Moderate", "description": "Moderate burn severity.", "color_hint": "FFFF00" }, { "value": 4, "name": "High", "description": "High burn severity.", "color_hint": "FF0000" }, { "value": 5, "name": "Increased Greenness", "description": "Increased greenness / increased post-fire vegetation response. Not a burn severity level.", "color_hint": "7FFF00" }, { "value": 6, "name": "Non-Processing Area Mask", "description": "Area excluded from severity mapping (cloud, shadow, missing imagery). Not a burn severity level.", "color_hint": "FFFFFF" } ] } ] }, "mtbs-severity-ak-cog-1999": { "href": "https://s3-west.nrp-nautilus.io/public-fire/mtbs-severity-1984-2024-ak/mtbs-severity-ak-1999-cog.tif", "type": "image/tiff; application=geotiff; profile=cloud-optimized", "title": "MTBS burn severity 1999 (Alaska, 30 m COG)", "description": "Thematic burn severity for fires mapped in 1999, reprojected from the source equal-area Albers grid to EPSG:4326 with nearest-neighbour resampling \u2014 required, because the values are class codes and any other resampling invents classes the source does not contain. Geographic and therefore not equal-area: use the hex assets for area statistics.", "roles": [ "data" ], "raster:bands": [ { "name": "burn_severity", "data_type": "uint8", "nodata": 0, "spatial_resolution": 30, "unit": "class code", "classification:classes": [ { "value": 0, "name": "Background / Not Mapped", "description": "Ground that is not mapped burned area -- outside any MTBS fire perimeter, or source no-data. This is the raster's no-data value and the large majority of every source mosaic. In the fractional-coverage asset it is the share of the cell lying outside any mapped fire, which is what makes each cell's shares sum to 1. It is absent from the dominant-class asset, where no-data is dropped. Not a severity level: exclude it from every severity denominator.", "color_hint": "000000" }, { "value": 1, "name": "Unburned to Low", "description": "Unburned, or burned at a severity too low to separate from unburned.", "color_hint": "006400" }, { "value": 2, "name": "Low", "description": "Low burn severity.", "color_hint": "7FFFD4" }, { "value": 3, "name": "Moderate", "description": "Moderate burn severity.", "color_hint": "FFFF00" }, { "value": 4, "name": "High", "description": "High burn severity.", "color_hint": "FF0000" }, { "value": 5, "name": "Increased Greenness", "description": "Increased greenness / increased post-fire vegetation response. Not a burn severity level.", "color_hint": "7FFF00" }, { "value": 6, "name": "Non-Processing Area Mask", "description": "Area excluded from severity mapping (cloud, shadow, missing imagery). Not a burn severity level.", "color_hint": "FFFFFF" } ] } ] }, "mtbs-severity-ak-cog-2000": { "href": "https://s3-west.nrp-nautilus.io/public-fire/mtbs-severity-1984-2024-ak/mtbs-severity-ak-2000-cog.tif", "type": "image/tiff; application=geotiff; profile=cloud-optimized", "title": "MTBS burn severity 2000 (Alaska, 30 m COG)", "description": "Thematic burn severity for fires mapped in 2000, reprojected from the source equal-area Albers grid to EPSG:4326 with nearest-neighbour resampling \u2014 required, because the values are class codes and any other resampling invents classes the source does not contain. Geographic and therefore not equal-area: use the hex assets for area statistics.", "roles": [ "data" ], "raster:bands": [ { "name": "burn_severity", "data_type": "uint8", "nodata": 0, "spatial_resolution": 30, "unit": "class code", "classification:classes": [ { "value": 0, "name": "Background / Not Mapped", "description": "Ground that is not mapped burned area -- outside any MTBS fire perimeter, or source no-data. This is the raster's no-data value and the large majority of every source mosaic. In the fractional-coverage asset it is the share of the cell lying outside any mapped fire, which is what makes each cell's shares sum to 1. It is absent from the dominant-class asset, where no-data is dropped. Not a severity level: exclude it from every severity denominator.", "color_hint": "000000" }, { "value": 1, "name": "Unburned to Low", "description": "Unburned, or burned at a severity too low to separate from unburned.", "color_hint": "006400" }, { "value": 2, "name": "Low", "description": "Low burn severity.", "color_hint": "7FFFD4" }, { "value": 3, "name": "Moderate", "description": "Moderate burn severity.", "color_hint": "FFFF00" }, { "value": 4, "name": "High", "description": "High burn severity.", "color_hint": "FF0000" }, { "value": 5, "name": "Increased Greenness", "description": "Increased greenness / increased post-fire vegetation response. Not a burn severity level.", "color_hint": "7FFF00" }, { "value": 6, "name": "Non-Processing Area Mask", "description": "Area excluded from severity mapping (cloud, shadow, missing imagery). Not a burn severity level.", "color_hint": "FFFFFF" } ] } ] }, "mtbs-severity-ak-cog-2002": { "href": "https://s3-west.nrp-nautilus.io/public-fire/mtbs-severity-1984-2024-ak/mtbs-severity-ak-2002-cog.tif", "type": "image/tiff; application=geotiff; profile=cloud-optimized", "title": "MTBS burn severity 2002 (Alaska, 30 m COG)", "description": "Thematic burn severity for fires mapped in 2002, reprojected from the source equal-area Albers grid to EPSG:4326 with nearest-neighbour resampling \u2014 required, because the values are class codes and any other resampling invents classes the source does not contain. Geographic and therefore not equal-area: use the hex assets for area statistics.", "roles": [ "data" ], "raster:bands": [ { "name": "burn_severity", "data_type": "uint8", "nodata": 0, "spatial_resolution": 30, "unit": "class code", "classification:classes": [ { "value": 0, "name": "Background / Not Mapped", "description": "Ground that is not mapped burned area -- outside any MTBS fire perimeter, or source no-data. This is the raster's no-data value and the large majority of every source mosaic. In the fractional-coverage asset it is the share of the cell lying outside any mapped fire, which is what makes each cell's shares sum to 1. It is absent from the dominant-class asset, where no-data is dropped. Not a severity level: exclude it from every severity denominator.", "color_hint": "000000" }, { "value": 1, "name": "Unburned to Low", "description": "Unburned, or burned at a severity too low to separate from unburned.", "color_hint": "006400" }, { "value": 2, "name": "Low", "description": "Low burn severity.", "color_hint": "7FFFD4" }, { "value": 3, "name": "Moderate", "description": "Moderate burn severity.", "color_hint": "FFFF00" }, { "value": 4, "name": "High", "description": "High burn severity.", "color_hint": "FF0000" }, { "value": 5, "name": "Increased Greenness", "description": "Increased greenness / increased post-fire vegetation response. Not a burn severity level.", "color_hint": "7FFF00" }, { "value": 6, "name": "Non-Processing Area Mask", "description": "Area excluded from severity mapping (cloud, shadow, missing imagery). Not a burn severity level.", "color_hint": "FFFFFF" } ] } ] }, "mtbs-severity-ak-cog-2003": { "href": "https://s3-west.nrp-nautilus.io/public-fire/mtbs-severity-1984-2024-ak/mtbs-severity-ak-2003-cog.tif", "type": "image/tiff; application=geotiff; profile=cloud-optimized", "title": "MTBS burn severity 2003 (Alaska, 30 m COG)", "description": "Thematic burn severity for fires mapped in 2003, reprojected from the source equal-area Albers grid to EPSG:4326 with nearest-neighbour resampling \u2014 required, because the values are class codes and any other resampling invents classes the source does not contain. Geographic and therefore not equal-area: use the hex assets for area statistics.", "roles": [ "data" ], "raster:bands": [ { "name": "burn_severity", "data_type": "uint8", "nodata": 0, "spatial_resolution": 30, "unit": "class code", "classification:classes": [ { "value": 0, "name": "Background / Not Mapped", "description": "Ground that is not mapped burned area -- outside any MTBS fire perimeter, or source no-data. This is the raster's no-data value and the large majority of every source mosaic. In the fractional-coverage asset it is the share of the cell lying outside any mapped fire, which is what makes each cell's shares sum to 1. It is absent from the dominant-class asset, where no-data is dropped. 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Not a burn severity level.", "color_hint": "FFFFFF" } ] } ] }, "mtbs-severity-ak-cog-2004": { "href": "https://s3-west.nrp-nautilus.io/public-fire/mtbs-severity-1984-2024-ak/mtbs-severity-ak-2004-cog.tif", "type": "image/tiff; application=geotiff; profile=cloud-optimized", "title": "MTBS burn severity 2004 (Alaska, 30 m COG)", "description": "Thematic burn severity for fires mapped in 2004, reprojected from the source equal-area Albers grid to EPSG:4326 with nearest-neighbour resampling \u2014 required, because the values are class codes and any other resampling invents classes the source does not contain. Geographic and therefore not equal-area: use the hex assets for area statistics.", "roles": [ "data" ], "raster:bands": [ { "name": "burn_severity", "data_type": "uint8", "nodata": 0, "spatial_resolution": 30, "unit": "class code", "classification:classes": [ { "value": 0, "name": "Background / Not Mapped", "description": "Ground that is not mapped burned area -- outside any MTBS fire perimeter, or source no-data. This is the raster's no-data value and the large majority of every source mosaic. In the fractional-coverage asset it is the share of the cell lying outside any mapped fire, which is what makes each cell's shares sum to 1. It is absent from the dominant-class asset, where no-data is dropped. 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Geographic and therefore not equal-area: use the hex assets for area statistics.", "roles": [ "data" ], "raster:bands": [ { "name": "burn_severity", "data_type": "uint8", "nodata": 0, "spatial_resolution": 30, "unit": "class code", "classification:classes": [ { "value": 0, "name": "Background / Not Mapped", "description": "Ground that is not mapped burned area -- outside any MTBS fire perimeter, or source no-data. This is the raster's no-data value and the large majority of every source mosaic. In the fractional-coverage asset it is the share of the cell lying outside any mapped fire, which is what makes each cell's shares sum to 1. It is absent from the dominant-class asset, where no-data is dropped. 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Geographic and therefore not equal-area: use the hex assets for area statistics.", "roles": [ "data" ], "raster:bands": [ { "name": "burn_severity", "data_type": "uint8", "nodata": 0, "spatial_resolution": 30, "unit": "class code", "classification:classes": [ { "value": 0, "name": "Background / Not Mapped", "description": "Ground that is not mapped burned area -- outside any MTBS fire perimeter, or source no-data. This is the raster's no-data value and the large majority of every source mosaic. In the fractional-coverage asset it is the share of the cell lying outside any mapped fire, which is what makes each cell's shares sum to 1. It is absent from the dominant-class asset, where no-data is dropped. Not a severity level: exclude it from every severity denominator.", "color_hint": "000000" }, { "value": 1, "name": "Unburned to Low", "description": "Unburned, or burned at a severity too low to separate from unburned.", "color_hint": "006400" }, { "value": 2, "name": "Low", "description": "Low burn severity.", "color_hint": "7FFFD4" }, { "value": 3, "name": "Moderate", "description": "Moderate burn severity.", "color_hint": "FFFF00" }, { "value": 4, "name": "High", "description": "High burn severity.", "color_hint": "FF0000" }, { "value": 5, "name": "Increased Greenness", "description": "Increased greenness / increased post-fire vegetation response. Not a burn severity level.", "color_hint": "7FFF00" }, { "value": 6, "name": "Non-Processing Area Mask", "description": "Area excluded from severity mapping (cloud, shadow, missing imagery). 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Geographic and therefore not equal-area: use the hex assets for area statistics.", "roles": [ "data" ], "raster:bands": [ { "name": "burn_severity", "data_type": "uint8", "nodata": 0, "spatial_resolution": 30, "unit": "class code", "classification:classes": [ { "value": 0, "name": "Background / Not Mapped", "description": "Ground that is not mapped burned area -- outside any MTBS fire perimeter, or source no-data. This is the raster's no-data value and the large majority of every source mosaic. In the fractional-coverage asset it is the share of the cell lying outside any mapped fire, which is what makes each cell's shares sum to 1. It is absent from the dominant-class asset, where no-data is dropped. 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Geographic and therefore not equal-area: use the hex assets for area statistics.", "roles": [ "data" ], "raster:bands": [ { "name": "burn_severity", "data_type": "uint8", "nodata": 0, "spatial_resolution": 30, "unit": "class code", "classification:classes": [ { "value": 0, "name": "Background / Not Mapped", "description": "Ground that is not mapped burned area -- outside any MTBS fire perimeter, or source no-data. This is the raster's no-data value and the large majority of every source mosaic. In the fractional-coverage asset it is the share of the cell lying outside any mapped fire, which is what makes each cell's shares sum to 1. It is absent from the dominant-class asset, where no-data is dropped. 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Geographic and therefore not equal-area: use the hex assets for area statistics.", "roles": [ "data" ], "raster:bands": [ { "name": "burn_severity", "data_type": "uint8", "nodata": 0, "spatial_resolution": 30, "unit": "class code", "classification:classes": [ { "value": 0, "name": "Background / Not Mapped", "description": "Ground that is not mapped burned area -- outside any MTBS fire perimeter, or source no-data. This is the raster's no-data value and the large majority of every source mosaic. In the fractional-coverage asset it is the share of the cell lying outside any mapped fire, which is what makes each cell's shares sum to 1. It is absent from the dominant-class asset, where no-data is dropped. 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Not a severity level: exclude it from every severity denominator.", "color_hint": "000000" }, { "value": 1, "name": "Unburned to Low", "description": "Unburned, or burned at a severity too low to separate from unburned.", "color_hint": "006400" }, { "value": 2, "name": "Low", "description": "Low burn severity.", "color_hint": "7FFFD4" }, { "value": 3, "name": "Moderate", "description": "Moderate burn severity.", "color_hint": "FFFF00" }, { "value": 4, "name": "High", "description": "High burn severity.", "color_hint": "FF0000" }, { "value": 5, "name": "Increased Greenness", "description": "Increased greenness / increased post-fire vegetation response. Not a burn severity level.", "color_hint": "7FFF00" }, { "value": 6, "name": "Non-Processing Area Mask", "description": "Area excluded from severity mapping (cloud, shadow, missing imagery). Not a burn severity level.", "color_hint": "FFFFFF" } ] } ] }, "mtbs-severity-ak-cog-2020": { "href": "https://s3-west.nrp-nautilus.io/public-fire/mtbs-severity-1984-2024-ak/mtbs-severity-ak-2020-cog.tif", "type": "image/tiff; application=geotiff; profile=cloud-optimized", "title": "MTBS burn severity 2020 (Alaska, 30 m COG)", "description": "Thematic burn severity for fires mapped in 2020, reprojected from the source equal-area Albers grid to EPSG:4326 with nearest-neighbour resampling \u2014 required, because the values are class codes and any other resampling invents classes the source does not contain. Geographic and therefore not equal-area: use the hex assets for area statistics.", "roles": [ "data" ], "raster:bands": [ { "name": "burn_severity", "data_type": "uint8", "nodata": 0, "spatial_resolution": 30, "unit": "class code", "classification:classes": [ { "value": 0, "name": "Background / Not Mapped", "description": "Ground that is not mapped burned area -- outside any MTBS fire perimeter, or source no-data. This is the raster's no-data value and the large majority of every source mosaic. In the fractional-coverage asset it is the share of the cell lying outside any mapped fire, which is what makes each cell's shares sum to 1. It is absent from the dominant-class asset, where no-data is dropped. Not a severity level: exclude it from every severity denominator.", "color_hint": "000000" }, { "value": 1, "name": "Unburned to Low", "description": "Unburned, or burned at a severity too low to separate from unburned.", "color_hint": "006400" }, { "value": 2, "name": "Low", "description": "Low burn severity.", "color_hint": "7FFFD4" }, { "value": 3, "name": "Moderate", "description": "Moderate burn severity.", "color_hint": "FFFF00" }, { "value": 4, "name": "High", "description": "High burn severity.", "color_hint": "FF0000" }, { "value": 5, "name": "Increased Greenness", "description": "Increased greenness / increased post-fire vegetation response. Not a burn severity level.", "color_hint": "7FFF00" }, { "value": 6, "name": "Non-Processing Area Mask", "description": "Area excluded from severity mapping (cloud, shadow, missing imagery). Not a burn severity level.", "color_hint": "FFFFFF" } ] } ] }, "mtbs-severity-ak-cog-2021": { "href": "https://s3-west.nrp-nautilus.io/public-fire/mtbs-severity-1984-2024-ak/mtbs-severity-ak-2021-cog.tif", "type": "image/tiff; application=geotiff; profile=cloud-optimized", "title": "MTBS burn severity 2021 (Alaska, 30 m COG)", "description": "Thematic burn severity for fires mapped in 2021, reprojected from the source equal-area Albers grid to EPSG:4326 with nearest-neighbour resampling \u2014 required, because the values are class codes and any other resampling invents classes the source does not contain. Geographic and therefore not equal-area: use the hex assets for area statistics.", "roles": [ "data" ], "raster:bands": [ { "name": "burn_severity", "data_type": "uint8", "nodata": 0, "spatial_resolution": 30, "unit": "class code", "classification:classes": [ { "value": 0, "name": "Background / Not Mapped", "description": "Ground that is not mapped burned area -- outside any MTBS fire perimeter, or source no-data. This is the raster's no-data value and the large majority of every source mosaic. In the fractional-coverage asset it is the share of the cell lying outside any mapped fire, which is what makes each cell's shares sum to 1. It is absent from the dominant-class asset, where no-data is dropped. Not a severity level: exclude it from every severity denominator.", "color_hint": "000000" }, { "value": 1, "name": "Unburned to Low", "description": "Unburned, or burned at a severity too low to separate from unburned.", "color_hint": "006400" }, { "value": 2, "name": "Low", "description": "Low burn severity.", "color_hint": "7FFFD4" }, { "value": 3, "name": "Moderate", "description": "Moderate burn severity.", "color_hint": "FFFF00" }, { "value": 4, "name": "High", "description": "High burn severity.", "color_hint": "FF0000" }, { "value": 5, "name": "Increased Greenness", "description": "Increased greenness / increased post-fire vegetation response. Not a burn severity level.", "color_hint": "7FFF00" }, { "value": 6, "name": "Non-Processing Area Mask", "description": "Area excluded from severity mapping (cloud, shadow, missing imagery). Not a burn severity level.", "color_hint": "FFFFFF" } ] } ] }, "mtbs-severity-ak-cog-2022": { "href": "https://s3-west.nrp-nautilus.io/public-fire/mtbs-severity-1984-2024-ak/mtbs-severity-ak-2022-cog.tif", "type": "image/tiff; application=geotiff; profile=cloud-optimized", "title": "MTBS burn severity 2022 (Alaska, 30 m COG)", "description": "Thematic burn severity for fires mapped in 2022, reprojected from the source equal-area Albers grid to EPSG:4326 with nearest-neighbour resampling \u2014 required, because the values are class codes and any other resampling invents classes the source does not contain. Geographic and therefore not equal-area: use the hex assets for area statistics.", "roles": [ "data" ], "raster:bands": [ { "name": "burn_severity", "data_type": "uint8", "nodata": 0, "spatial_resolution": 30, "unit": "class code", "classification:classes": [ { "value": 0, "name": "Background / Not Mapped", "description": "Ground that is not mapped burned area -- outside any MTBS fire perimeter, or source no-data. This is the raster's no-data value and the large majority of every source mosaic. In the fractional-coverage asset it is the share of the cell lying outside any mapped fire, which is what makes each cell's shares sum to 1. It is absent from the dominant-class asset, where no-data is dropped. Not a severity level: exclude it from every severity denominator.", "color_hint": "000000" }, { "value": 1, "name": "Unburned to Low", "description": "Unburned, or burned at a severity too low to separate from unburned.", "color_hint": "006400" }, { "value": 2, "name": "Low", "description": "Low burn severity.", "color_hint": "7FFFD4" }, { "value": 3, "name": "Moderate", "description": "Moderate burn severity.", "color_hint": "FFFF00" }, { "value": 4, "name": "High", "description": "High burn severity.", "color_hint": "FF0000" }, { "value": 5, "name": "Increased Greenness", "description": "Increased greenness / increased post-fire vegetation response. Not a burn severity level.", "color_hint": "7FFF00" }, { "value": 6, "name": "Non-Processing Area Mask", "description": "Area excluded from severity mapping (cloud, shadow, missing imagery). Not a burn severity level.", "color_hint": "FFFFFF" } ] } ] }, "mtbs-severity-ak-cog-2023": { "href": "https://s3-west.nrp-nautilus.io/public-fire/mtbs-severity-1984-2024-ak/mtbs-severity-ak-2023-cog.tif", "type": "image/tiff; application=geotiff; profile=cloud-optimized", "title": "MTBS burn severity 2023 (Alaska, 30 m COG)", "description": "Thematic burn severity for fires mapped in 2023, reprojected from the source equal-area Albers grid to EPSG:4326 with nearest-neighbour resampling \u2014 required, because the values are class codes and any other resampling invents classes the source does not contain. Geographic and therefore not equal-area: use the hex assets for area statistics.", "roles": [ "data" ], "raster:bands": [ { "name": "burn_severity", "data_type": "uint8", "nodata": 0, "spatial_resolution": 30, "unit": "class code", "classification:classes": [ { "value": 0, "name": "Background / Not Mapped", "description": "Ground that is not mapped burned area -- outside any MTBS fire perimeter, or source no-data. This is the raster's no-data value and the large majority of every source mosaic. In the fractional-coverage asset it is the share of the cell lying outside any mapped fire, which is what makes each cell's shares sum to 1. It is absent from the dominant-class asset, where no-data is dropped. Not a severity level: exclude it from every severity denominator.", "color_hint": "000000" }, { "value": 1, "name": "Unburned to Low", "description": "Unburned, or burned at a severity too low to separate from unburned.", "color_hint": "006400" }, { "value": 2, "name": "Low", "description": "Low burn severity.", "color_hint": "7FFFD4" }, { "value": 3, "name": "Moderate", "description": "Moderate burn severity.", "color_hint": "FFFF00" }, { "value": 4, "name": "High", "description": "High burn severity.", "color_hint": "FF0000" }, { "value": 5, "name": "Increased Greenness", "description": "Increased greenness / increased post-fire vegetation response. Not a burn severity level.", "color_hint": "7FFF00" }, { "value": 6, "name": "Non-Processing Area Mask", "description": "Area excluded from severity mapping (cloud, shadow, missing imagery). Not a burn severity level.", "color_hint": "FFFFFF" } ] } ] }, "mtbs-severity-ak-hex": { "href": "https://s3-west.nrp-nautilus.io/public-fire/mtbs-severity-1984-2024-ak/hex/year=*/h0=*/data_0.parquet", "type": "application/x-parquet", "title": "MTBS burn severity, Alaska - H3 hex, dominant class, all years", "description": "One row per (year, populated resolution 10 cell) \u2014 12,270,403 rows across 36 years and 1 resolution 0 partitions, covering 11,429,727 distinct cells of ground. Rows exceed distinct cells because ground that burned in more than one year appears once per year; that difference is the reburn record, so which of the two a total means has to be stated. The `mode` reducer gives each cell the majority severity class of the source pixels inside it, which preserves classes that exist in the source where an average would fabricate ones that do not. Cells with no burned pixel are dropped, so this asset covers burned ground only. No attribute is repeated across cells here, so `COUNT(*)` counts cells and cells are a valid area proxy. For the share of an area at a given severity, use the fractional-coverage asset instead \u2014 `mode` keeps only the dominant class.", "roles": [ "data" ], "h3:native_resolution": 10, "h3:parent_resolutions": [ 9, 8, 0 ], "classification:classes": [ { "value": 1, "name": "Unburned to Low", "description": "Unburned, or burned at a severity too low to separate from unburned." }, { "value": 2, "name": "Low", "description": "Low burn severity." }, { "value": 3, "name": "Moderate", "description": "Moderate burn severity." }, { "value": 4, "name": "High", "description": "High burn severity." }, { "value": 5, "name": "Increased Greenness", "description": "Increased greenness / increased post-fire vegetation response. Not a burn severity level." }, { "value": 6, "name": "Non-Processing Area Mask", "description": "Area excluded from severity mapping (cloud, shadow, missing imagery). Not a burn severity level." } ], "table:columns": [ { "name": "severity", "type": "uint8", "description": "Thematic burn severity class. Values: 0=Background / Not Mapped, 1=Unburned to Low, 2=Low, 3=Moderate, 4=High, 5=Increased Greenness, 6=Non-Processing Area Mask. Classes 1 to 4 are severity levels; class 5 is increased post-fire greenness and class 6 is area excluded from severity mapping, so neither is a severity level. Labels are those published with the source rasters. Code 0 is background \u2014 ground outside any mapped fire \u2014 and whether it is present depends on the asset: the dominant-class (`mode`) asset drops source no-data, so it holds only codes 1 to 6 and every row is burned ground, while the fractional-coverage asset keeps code 0 as the unburned share of each cell, which is what makes a cell's shares sum to 1. Exclude 0, 5 and 6 from any severity denominator.", "values": [ 1, 2, 3, 4, 5, 6 ] }, { "name": "h10", "type": "uint64", "description": "H3 cell identifier at resolution 10." }, { "name": "h9", "type": "uint64", "description": "H3 cell identifier at resolution 9." }, { "name": "h8", "type": "uint64", "description": "H3 cell identifier at resolution 8. This is the shared join key across the catalog \u2014 use it to join this layer to the wildfire hazard potential collections in this bucket and to inventoried roadless areas." }, { "name": "h0", "type": "int64", "description": "H3 cell identifier at resolution 0, used as the partition key for hive-partitioned reads." }, { "name": "year", "type": "int64", "description": "Calendar year of the annual severity composite, used as a partition key. Filter one year with WHERE year = 2020. A year absent from this column had no retrievable source mosaic and is listed in the collection description." } ] }, "mtbs-severity-ak-hex-fractions": { "href": "https://s3-west.nrp-nautilus.io/public-fire/mtbs-severity-1984-2024-ak/hex-fractions/year=*/h0=*/data_0.parquet", "type": "application/x-parquet", "title": "MTBS burn severity, Alaska - H3 hex, per-class coverage, all years", "description": "Long format: one row per (year, resolution 10 cell, severity class), with `frac` giving that class's share of the cell \u2014 30,679,520 rows across 36 years and 1 resolution 0 partitions. This is the asset for any question about how much area burned at a given severity, because it keeps the mix within each cell instead of collapsing it to a single dominant class. Shares within one cell and year sum to approximately 1. Class codes 5 and 6 are present and should be left out of a severity denominator; see the collection description for the query.", "roles": [ "data" ], "h3:native_resolution": 10, "h3:parent_resolutions": [ 9, 8, 0 ], "classification:classes": [ { "value": 0, "name": "Background / Not Mapped", "description": "Ground that is not mapped burned area -- outside any MTBS fire perimeter, or source no-data. This is the raster's no-data value and the large majority of every source mosaic. In the fractional-coverage asset it is the share of the cell lying outside any mapped fire, which is what makes each cell's shares sum to 1. It is absent from the dominant-class asset, where no-data is dropped. Not a severity level: exclude it from every severity denominator." }, { "value": 1, "name": "Unburned to Low", "description": "Unburned, or burned at a severity too low to separate from unburned." }, { "value": 2, "name": "Low", "description": "Low burn severity." }, { "value": 3, "name": "Moderate", "description": "Moderate burn severity." }, { "value": 4, "name": "High", "description": "High burn severity." }, { "value": 5, "name": "Increased Greenness", "description": "Increased greenness / increased post-fire vegetation response. Not a burn severity level." }, { "value": 6, "name": "Non-Processing Area Mask", "description": "Area excluded from severity mapping (cloud, shadow, missing imagery). Not a burn severity level." } ], "table:columns": [ { "name": "severity", "type": "uint8", "description": "Thematic burn severity class. Values: 0=Background / Not Mapped, 1=Unburned to Low, 2=Low, 3=Moderate, 4=High, 5=Increased Greenness, 6=Non-Processing Area Mask. Classes 1 to 4 are severity levels; class 5 is increased post-fire greenness and class 6 is area excluded from severity mapping, so neither is a severity level. Labels are those published with the source rasters. Code 0 is background \u2014 ground outside any mapped fire \u2014 and whether it is present depends on the asset: the dominant-class (`mode`) asset drops source no-data, so it holds only codes 1 to 6 and every row is burned ground, while the fractional-coverage asset keeps code 0 as the unburned share of each cell, which is what makes a cell's shares sum to 1. Exclude 0, 5 and 6 from any severity denominator.", "values": [ 0, 1, 2, 3, 4, 5, 6 ] }, { "name": "frac", "type": "double", "description": "Share of the whole H3 cell covered by this severity class, between 0 and 1 \u2014 a share of the cell's full ground area, not of its burned part. One row per (year, cell, class). The shares within one cell and year sum to exactly 1, but only because class 0 (the unburned remainder of the cell) is included; summing only classes 1 to 6 gives the share of the cell that is mapped burned ground. Multiply by the cell's ground area for the area in that class." }, { "name": "h10", "type": "uint64", "description": "H3 cell identifier at resolution 10." }, { "name": "h9", "type": "uint64", "description": "H3 cell identifier at resolution 9." }, { "name": "h8", "type": "uint64", "description": "H3 cell identifier at resolution 8. This is the shared join key across the catalog \u2014 use it to join this layer to the wildfire hazard potential collections in this bucket and to inventoried roadless areas." }, { "name": "h0", "type": "int64", "description": "H3 cell identifier at resolution 0, used as the partition key for hive-partitioned reads." }, { "name": "year", "type": "int64", "description": "Calendar year of the annual severity composite, used as a partition key. Filter one year with WHERE year = 2020. A year absent from this column had no retrievable source mosaic and is listed in the collection description." } ] } } }